Secure assertion attribute for a federated log in

ABSTRACT

Embodiments of the present invention disclose a method, computer program product, and system for authenticating a user. The application server receives a user log in request and determines if a unique identification accompanies the received user log in request. The application server uses the unique identification to authenticate the identity of the user. The application server determines if the unique identification has been previously received by searching a first database to see if the unique identification was already stored in the first database. If the unique identification is not in the first database then the application server stores the unique identification and grants the user access to the one or more applications hosted on the application server.

BACKGROUND

The present invention relates generally to user authentication, and moreparticularly to limiting access to authorized users.

Many organizations use a security assertion mark-up language (SAML)federated log in to authenticate a user when the user logs in to theorganization system. A common identifier used by an organization forauthentication is a user email address associated with each user. Theuser may be able to log in to another application or a third partyserver through an access portal on the organization system. Theorganization systems transmit the user email address to the otherapplication or the third party server as a means to authenticate theidentity of the user. However, within most organizations a systemadministrator and/or a department administrator is able to access andedit a database within the organization that contains the user emailaddress that is sent for user authentication. In this situation, it ispossible that a user may be impersonated when a person who has access tothe database is able to make changes to the user email addressassociated with each user.

BRIEF SUMMARY

Additional aspects and/or advantages will be set forth in part in thedescription which follows and, in part, will be apparent from thedescription, or may be learned by practice of the invention.

Embodiments of the present invention disclose a method, computer programproduct, and system for authenticating a user. The first computerreceives a request for a user log in from a user computing device andauthenticates an identity of the user and granting the user access toapplications hosted on the first computer, wherein one of the thoseapplications is an access portal to a second computer. The firstcomputer searches a storage unit for a unique identification that isassociated with the user, and the first computer determines that theunique identification has not been found in the storage unit. Inresponse to not finding the unique identification in the storage unit,the first computer generates the unique identification to be associatedwith a user, based on a unique arbitrary value to generate a universallyunique identifier. The first computer stores the generated uniqueidentification in the storage unit. A second computer receives a requestfor a user log in from the access portal hosted on the first computerand determines if the unique identification accompanies the receiveduser log in request, wherein the unique identification is used toauthenticate the identity of the user. The second computer determines ifthe unique identification has been previously received by searching adatabase to see if the unique identification was already stored in thedatabase. In response to the unique identification not being previouslyreceived, the second computer stores the unique identification to thedatabase and grants access to the user to an application hosted on thesecond computer.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and advantages of certainexemplary embodiments of the present invention will be more apparentfrom the following description taken in conjunction with theaccompanying drawings, in which:

FIG. 1 is a functional block diagram illustrating a user authenticationsystem, in accordance with an embodiment of the present invention.

FIG. 2 is a flowchart depicting operational steps of a client serverauthenticating a user and creating a unique user identificationassociated with the user for the user authentication system of FIG. 1,in accordance with an embodiment of the present invention.

FIG. 3 is a flowchart depicting operational steps of the applicationserver for authenticating the user of the user authentication system ofFIG. 1, in accordance with an embodiment of the present invention.

FIG. 4 is a block diagram of components of a computing device of theuser authentication system of FIG. 1, in accordance with embodiments ofthe present invention.

FIG. 5 depicts a cloud computing environment according to an embodimentof the present invention.

FIG. 6 depicts abstraction model layers according to an embodiment ofthe present invention.

DETAILED DESCRIPTION

The following description with reference to the accompanying drawings isprovided to assist in a comprehensive understanding of exemplaryembodiments of the invention as defined by the claims and theirequivalents. It includes various specific details to assist in thatunderstanding but these are to be regarded as merely exemplary.Accordingly, those of ordinary skill in the art will recognize thatvarious changes and modifications of the embodiments described hereincan be made without departing from the scope and spirit of theinvention. In addition, descriptions of well-known functions andconstructions may be omitted for clarity and conciseness.

The terms and words used in the following description and claims are notlimited to the bibliographical meanings, but, are merely used to enablea clear and consistent understanding of the invention. Accordingly, itshould be apparent to those skilled in the art that the followingdescription of exemplary embodiments of the present invention isprovided for illustration purpose only and not for the purpose oflimiting the invention as defined by the appended claims and theirequivalents.

It is to be understood that the singular forms “a,” “an,” and “the”include plural referents unless the context clearly dictates otherwise.Thus, for example, reference to “a component surface” includes referenceto one or more of such surfaces unless the context clearly dictatesotherwise.

Reference will now be made in detail to the embodiments of the presentinvention, examples of which are illustrated in the accompanyingdrawings, wherein like reference numerals refer to like elementsthroughout. Embodiments of the invention are generally directed to asystem for user authentication using a secure attribute for a federatedlog in. A company or organization hosts a client server or a system thatan employee or a user is able to log in to and allows the user to accessthe information and/or application stored on the client server. Theclient server assigns a unique identifier to each user and stores thatunique identifier in a secure database. The client server contains anaccess portal for an application server or a third party server and theclient server transmits the unique identifier to the application serveror the third party server to authenticate the user. The applicationserver determines if the user has a unique identifier associated withthe log in and determines if the unique identifier is stored within anidentification database. If it is determined that the user's uniqueidentifier is already stored in the database, then the user is grantedaccess to the application and/or the identifier is added to the databaseif not previously stored before the user is granted access to theapplication.

FIG. 1 is a functional block diagram illustrating a user authenticationsystem 100, in accordance with an embodiment of the present invention.The user authentication system 100 includes a user computing device 120,a client server 130, and an application server 140 that communicate witheach other via network 110.

Network 110 can be, for example, a local area network (LAN), a wide areanetwork (WAN) such as the Internet, or a combination of the two, and caninclude wired, wireless, or fiber optic connections. In general, network110 can be any combination of connections and protocols that willsupport communications between the user computing device 120, the clientserver 130 and the application server 140, in accordance with anembodiment of the invention.

The user computing device 120 represents a computing device thatincludes a user interface, for example, a graphical user interface (GUI)122 that allows the user to access, for example, the application serverportal access 138. GUI 122 represents one or more user interfaces forsending and receiving information from the client server 130 and theapplication server 140. GUI 122 may be, for example, a web browser, anapplication, or other types of GUIs for communication between the usercomputing device 120, application server 140 and the client server 130,via the network 110, in accordance with an embodiment of the invention.

The user computing device 120 may be any type of computing devices thatare capable of connecting to network 110, for example, a laptopcomputer, tablet computer, netbook computer, personal computer (PC), adesktop computer, a smart phone, or any programmable electronic devicesupporting the functionality required by one or more embodiments of theinvention. The user computing device 120 may include internal andexternal hardware components, as depicted and described in furtherdetail below with respect to FIG. 4. In other embodiments, the usercomputing device 120 may operate in a cloud computing environment, asdepicted in FIGS. 5 and 6.

The client server 130 allows for the user computing device 120 to log into the organization or business system hosted on the client server 130.When logged into the client server 130 the user computing device 120 isable to access applications or other programs hosted on the clientserver 130, such as, application server portal access 138. The clientserver 130 includes a user identification module 132, an identificationgeneration module 134, a user identification storage database 136, andan application server portal access 138. The client server 130 mayinclude internal and external hardware components, as depicted anddescribed in further detail below with respect to FIG. 4. In otherembodiments, the client server 130 may operate in a cloud computingenvironment, as depicted in FIGS. 5 and 6.

The user identification module 132 receives a user log in request fromthe user computing device 120 when the user is trying to log on to theclient server 130 and determines if the user is authorized to access theclient server 130. In an exemplary embodiment, the user identificationmodule 132 uses a security assertion mark-up language (SAML) federatedlog in to authenticate the user.

A SAML implementation typically defines three roles: the principal, forexample, the user computing device, the identity provider (for example,the user identification module 132), and the service provider (forexample, the client server 130). In the use case addressed by SAML, theprincipal requests a service from the service provider. The serviceprovider requests and obtains an identity assertion from the identityprovider. On the basis of this assertion, the service provider can makean access control decision, in other words it can decide whether toperform some service for the connected principal. Before delivering theidentity assertion to the service provide, the identity provider mayrequest some information from the principal, such as a user name andpassword, in order to authenticate the principal.

The user identification module 132 further determines if a uniqueidentification has been previously generated for the user. The useridentification module 132 determines if a unique identification has beencreated by searching the user identification storage database 136 to seeif a corresponding unique identification to the user has been stored. Ifa unique identification has not been generated then the useridentification module 132 sends a request to the identificationgeneration module 134 to generate a unique identification.

The identification generation module 134 generates a uniqueidentification for each user that logs onto the client server 130. Theunique identification is only generated one time for each user since theunique identification does not change once they have been generated. Theunique identification is an immutable attribute that is assigned andstored in user identification storage database 136. The uniqueidentification can be, for example, a universally unique identifier(UUID), which is an identifier used in software construction. A UUID canbe, but is not limited to, a 128-bit value generated from applying theUUID generator to an arbitrary base value, for example, a time valuewhen the UUID is being generated, the user email address, or any uniquearbitaray value that can be used to generated the UUIDs. The intent ofUUIDs is to enable distributed systems to uniquely identify informationwithout significant central coordination.

The user identification storage database 136 is a data store that storesthe unique identification for each of the users. The user identificationstorage database 136 is a secure database with limited access to preventthe changing or editing of the stored unique identification associatedwith each user.

The application server portal access 138 allows for a user to gainaccess to the application server 140. The application server portalaccess 138 retrieves the unique identification associated with the userfrom the user identification storage database 136 and transmits theunique identification to the application server 140.

The application server 140 represents one or more platforms that host anapplication or another service that a user can access through theapplication server portal access 138. The application server includes adetermination module 142, a search module 144, an identificationdatabase 146, and an application 148. The application server 140 mayinclude internal and external hardware components, as depicted anddescribed in further detail below with respect to FIG. 4. In otherembodiments, the application server 140 may operate in a cloud computingenvironment, as depicted in FIGS. 5 and 6.

The determination module 142 determines when a user is trying to accessthe application server 140 through the application server portal access138 using a security assertion mark-up language (SAML) assertion. Thedetermination module 142 determines if a unique identificationaccompanies the request for access to the application server 140. TheSAML assertion is the signed data unique identification (i.e. the uniqueidentification associated with each user) is sent from the client server130 to the application server 140 for the purpose of affecting a log in.The unique identification is signed by the client server 130 and used toassert that the user is who they claim to be. The determination module142 determines if the unique identification that accompanies the userlog in request grants the user access to the application 148.

The determination module 142 requests that the search module 144 searchthe identification database 146 to determine if the uniqueidentification is known, i.e. the unique identification has beenpreviously received and stored by application server 140. When theunique identification is known, then the determination module 142 grantsthe user access to the application 148 or other services hosted onapplication server 140. When the unique identification is unknown, thenthe determination module 142 stores the unique identification in theidentification database 146 prior to or after granting the user accessto the application 148.

When the determination module 142 determines that a uniqueidentification does not accompany the user request for access to theapplication server 140, then the determination module 142 authenticatesthe user by using the user's email address and grants the user limitedaccess to the application 148. The determination module 142 thentransmits a request to the client server 130 that a uniqueidentification for the user to be generated.

The search module 144 represents a search application that is ablesearch the identification database 146 for the unique identificationthat accompanies the user log in request. The search module 144transmits to the determination module 142 if the unique identificationis known or not.

The identification database 146 is a secure data store that stores theunique identification that application receives from the different userslog in requests. The identification database 146 stores the uniqueidentifications for each user and the identification database 146 issecure database, such that, it prevents user access to the stored uniqueidentifications.

The application 148 is an application, program, software or service thatis provided to an authorized user. Once the user is granted access bythe determination module 142 then the user is able to access theapplication 148. If the determination module 142 grants the user limitedaccess then the user is only able to access previously predeterminedfunctions of the application 148.

FIG. 2 is a flowchart depicting operational steps of a client serverauthenticating a user and creating a unique user identificationassociated with the user for the user authentication system of FIG. 1,in accordance with an embodiment of the present invention.

The user identification module 132 receives the user log in (S200) andthe user identification module 132 determines if a unique identificationis already associated with the user (S210). When the user identificationmodule 132 determines that the user already has a unique identificationassociated with him, then the user identification module 132 grantsaccess to user to the client server 130 (S220). When the useridentification module 132 determines that a user does not have a uniqueidentification, then the identification generation module 134 generatesa unique identification to be associated with the user (S230) and theuser identification storage database 136 stores the uniqueidentification (S240). The user identification module 132 grants theuser access to the client server 130 (S250).

FIG. 3 is a flowchart depicting operational steps of the applicationserver for authenticating the user of the user authentication system ofFIG. 1, in accordance with an embodiment of the present invention.

The application server 140 receives the user's log in request throughthe application server portal access 138 on the client server (S300).The determination module 142 determines if a unique identification wasreceived with the user log in request (S305). When no uniqueidentification was received then the user email address is used forauthentication (S310) and the determination module 142 determines if theuser should be granted to access to the application server 140 (S315).When the user is not authorized for access then the determination module142 denies access to the user (S320). When the user is authorized toaccess the application server 140, then the determination module 142sends a request to the client server 130 for a unique identification togenerated for the user (S325) and the determination module 142 grantsthe user access to the application 148 (S330).

When a unique identification accompanies the user long in request, thesearch module 144 searches the identification database 146 to determineif the unique identification has been stored in the database (S335).When the unique identification has been previously stored then the useris granted access to the application 148 (S340). When the search module144 was not able to find the unique identification in the database, thenthe user email address is used for authentication and the determinationmodule 142 determines if the user should be granted to access to theapplication server 140 (S345). If the user is authorized for access thenthe determination module 142 stores the unique identification in theidentification database (S350) and the user is granted access to theapplication 148 (S355). When the user is not authorized for access thenthe determination module 142 denies access to the user (S320).

FIG. 4 depicts a block diagram of components of user computing device120, client server 130, and application serve 140 of the userauthentication system 100 of FIG. 1, in accordance with an embodiment ofthe present invention. It should be appreciated that FIG. 4 providesonly an illustration of one implementation and does not imply anylimitations with regard to the environments in which differentembodiments may be implemented. Many modifications to the depictedenvironment may be made.

User computing device 120, client server 130 and/or application server140 may include one or more processors 902, one or morecomputer-readable RAMs 904, one or more computer-readable ROMs 906, oneor more computer readable storage media 908, device drivers 912,read/write drive or interface 914, network adapter or interface 916, allinterconnected over a communications fabric 918. Communications fabric918 may be implemented with any architecture designed for passing dataand/or control information between processors (such as microprocessors,communications and network processors, etc.), system memory, peripheraldevices, and any other hardware components within a system.

One or more operating systems 910, and one or more application programs911, for example, user authentication program comprised of thedetermination module 142, the search module 144 and the identificationdatabase 146 (FIG. 1), are stored on one or more of the computerreadable storage media 908 for execution by one or more of theprocessors 902 via one or more of the respective RAMs 904 (whichtypically include cache memory). In the illustrated embodiment, each ofthe computer readable storage media 908 may be a magnetic disk storagedevice of an internal hard drive, CD-ROM, DVD, memory stick, magnetictape, magnetic disk, optical disk, a semiconductor storage device suchas RAM, ROM, EPROM, flash memory or any other computer-readable tangiblestorage device that can store a computer program and digitalinformation.

User computing device 120, client server 130 and/or application server140 may also include a R/W drive or interface 914 to read from and writeto one or more portable computer readable storage media 926. Applicationprograms 911 on user computing device 120, client server 130 and/orapplication server 140 may be stored on one or more of the portablecomputer readable storage media 926, read via the respective R/W driveor interface 914 and loaded into the respective computer readablestorage media 908.

User computing device 120, client server 130 and/or application server140 may also include a network adapter or interface 916, such as aTCP/IP adapter card or wireless communication adapter (such as a 4Gwireless communication adapter using OFDMA technology). Applicationprograms 911 on user computing device 120, client server 130 and/orapplication server 140 may be downloaded to the computing device from anexternal computer or external storage device via a network (for example,the Internet, a local area network or other wide area network orwireless network) and network adapter or interface 916. From the networkadapter or interface 916, the programs may be loaded onto computerreadable storage media 908. The network may comprise copper wires,optical fibers, wireless transmission, routers, firewalls, switches,gateway computers and/or edge servers.

User computing device 120, client server 130 and/or application server140 may also include a display screen 920, a keyboard or keypad 922, anda computer mouse or touchpad 924. Device drivers 912 interface todisplay screen 920 for imaging, to keyboard or keypad 922, to computermouse or touchpad 924, and/or to display screen 920 for pressure sensingof alphanumeric character entry and user selections. The device drivers912, R/W drive or interface 914 and network adapter or interface 916 maycomprise hardware and software (stored on computer readable storagemedia 908 and/or ROM 906).

The programs described herein are identified based upon the applicationfor which they are implemented in a specific embodiment of theinvention. However, it should be appreciated that any particular programnomenclature herein is used merely for convenience, and thus theinvention should not be limited to use solely in any specificapplication identified and/or implied by such nomenclature.

The present invention may be a system, a method, and/or a computerprogram product. The computer program product may include a computerreadable storage medium (or media) having computer readable programinstructions thereon for causing a processor to carry out aspects of thepresent invention.

The computer readable storage medium can be a tangible device that canretain and store instructions for use by an instruction executiondevice. The computer readable storage medium may be, for example, but isnot limited to, an electronic storage device, a magnetic storage device,an optical storage device, an electromagnetic storage device, asemiconductor storage device, or any suitable combination of theforegoing. A non-exhaustive list of more specific examples of thecomputer readable storage medium includes the following: a portablecomputer diskette, a hard disk, a random access memory (RAM), aread-only memory (ROM), an erasable programmable read-only memory (EPROMor Flash memory), a static random access memory (SRAM), a portablecompact disc read-only memory (CD-ROM), a digital versatile disk (DVD),a memory stick, a floppy disk, a mechanically encoded device such aspunch-cards or raised structures in a groove having instructionsrecorded thereon, and any suitable combination of the foregoing. Acomputer readable storage medium, as used herein, is not to be construedas being transitory signals per se, such as radio waves or other freelypropagating electromagnetic waves, electromagnetic waves propagatingthrough a waveguide or other transmission media (e.g., light pulsespassing through a fiber-optic cable), or electrical signals transmittedthrough a wire.

Computer readable program instructions described herein can bedownloaded to respective computing/processing devices from a computerreadable storage medium or to an external computer or external storagedevice via a network, for example, the Internet, a local area network, awide area network and/or a wireless network. The network may comprisecopper transmission cables, optical transmission fibers, wirelesstransmission, routers, firewalls, switches, gateway computers and/oredge servers. A network adapter card or network interface in eachcomputing/processing device receives computer readable programinstructions from the network and forwards the computer readable programinstructions for storage in a computer readable storage medium withinthe respective computing/processing device.

Computer readable program instructions for carrying out operations ofthe present invention may be assembler instructions,instruction-set-architecture (ISA) instructions, machine instructions,machine dependent instructions, microcode, firmware instructions,state-setting data, or either source code or object code written in anycombination of one or more programming languages, including an objectoriented programming language such as Smalltalk, C++ or the like, andconventional procedural programming languages, such as the “C”programming language or similar programming languages. The computerreadable program instructions may execute entirely on the user'scomputer, partly on the user's computer, as a stand-alone softwarepackage, partly on the user's computer and partly on a remote computeror entirely on the remote computer or server. In the latter scenario,the remote computer may be connected to the user's computer through anytype of network, including a local area network (LAN) or a wide areanetwork (WAN), or the connection may be made to an external computer(for example, through the Internet using an Internet Service Provider).In some embodiments, electronic circuitry including, for example,programmable logic circuitry, field-programmable gate arrays (FPGA), orprogrammable logic arrays (PLA) may execute the computer readableprogram instructions by utilizing state information of the computerreadable program instructions to personalize the electronic circuitry,in order to perform aspects of the present invention.

Aspects of the present invention are described herein with reference toflowchart illustrations and/or block diagrams of methods, apparatus(systems), and computer program products according to embodiments of theinvention. It will be understood that each block of the flowchartillustrations and/or block diagrams, and combinations of blocks in theflowchart illustrations and/or block diagrams, can be implemented bycomputer readable program instructions.

These computer readable program instructions may be provided to aprocessor of a general purpose computer, special purpose computer, orother programmable data processing apparatus to produce a machine, suchthat the instructions, which execute via the processor of the computeror other programmable data processing apparatus, create means forimplementing the functions/acts specified in the flowchart and/or blockdiagram block or blocks. These computer readable program instructionsmay also be stored in a computer readable storage medium that can directa computer, a programmable data processing apparatus, and/or otherdevices to function in a particular manner, such that the computerreadable storage medium having instructions stored therein comprises anarticle of manufacture including instructions which implement aspects ofthe function/act specified in the flowchart and/or block diagram blockor blocks.

The computer readable program instructions may also be loaded onto acomputer, other programmable data processing apparatus, or other deviceto cause a series of operational steps to be performed on the computer,other programmable apparatus or other device to produce a computerimplemented process, such that the instructions which execute on thecomputer, other programmable apparatus, or other device implement thefunctions/acts specified in the flowchart and/or block diagram block orblocks.

The flowchart and block diagrams in the figures illustrate thearchitecture, functionality, and operation of possible implementationsof systems, methods, and computer program products according to variousembodiments of the present invention. In this regard, each block in theflowchart or block diagrams may represent a module, segment, or portionof instructions, which comprises one or more executable instructions forimplementing the specified logical function(s). In some alternativeimplementations, the functions noted in the block may occur out of theorder noted in the figures. For example, two blocks shown in successionmay, in fact, be executed substantially concurrently, or the blocks maysometimes be executed in the reverse order, depending upon thefunctionality involved. It will also be noted that each block of theblock diagrams and/or flowchart illustration, and combinations of blocksin the block diagrams and/or flowchart illustration, can be implementedby special purpose hardware-based systems that perform the specifiedfunctions or acts or carry out combinations of special purpose hardwareand computer instructions.

Cloud computing is a model of service delivery for enabling convenient,on-demand network access to a shared pool of configurable computingresources (e.g. networks, network bandwidth, servers, processing,memory, storage, applications, virtual machines, and services) that canbe rapidly provisioned and released with minimal management effort orinteraction with a provider of the service. This cloud model may includeat least five characteristics, at least three service models, and atleast four deployment models.

Characteristics are as follows:

On-demand self-service: a cloud consumer can unilaterally provisioncomputing capabilities, such as server time and network storage, asneeded automatically without requiring human interaction with theservice's provider.

Broad network access: capabilities are available over a network andaccessed through standard mechanisms that promote use by heterogeneousthin or thick client platforms (e.g., mobile phones, laptops, and PDAs).

Resource pooling: the provider's computing resources are pooled to servemultiple consumers using a multi-tenant model, with different physicaland virtual resources dynamically assigned and reassigned according todemand. There is a sense of location independence in that the consumergenerally has no control or knowledge over the exact location of theprovided resources but may be able to specify location at a higher levelof abstraction (e.g., country, state, or datacenter).

Rapid elasticity: capabilities can be rapidly and elasticallyprovisioned, in some cases automatically, to quickly scale out andrapidly released to quickly scale in. To the consumer, the capabilitiesavailable for provisioning often appear to be unlimited and can bepurchased in any quantity at any time.

Measured service: cloud systems automatically control and optimizeresource use by leveraging a metering capability at some level ofabstraction appropriate to the type of service (e.g., storage,processing, bandwidth, and active user accounts). Resource usage can bemonitored, controlled, and reported providing transparency for both theprovider and consumer of the utilized service.

Service Models are as follows:

Software as a Service (SaaS): the capability provided to the consumer isto use the provider's applications running on a cloud infrastructure.The applications are accessible from various client devices through athin client interface such as a web browser (e.g., web-based e-mail).The consumer does not manage or control the underlying cloudinfrastructure including network, servers, operating systems, storage,or even individual application capabilities, with the possible exceptionof limited user-specific application configuration settings.

Platform as a Service (PaaS): the capability provided to the consumer isto deploy onto the cloud infrastructure consumer-created or acquiredapplications created using programming languages and tools supported bythe provider. The consumer does not manage or control the underlyingcloud infrastructure including networks, servers, operating systems, orstorage, but has control over the deployed applications and possiblyapplication hosting environment configurations.

Infrastructure as a Service (IaaS): the capability provided to theconsumer is to provision processing, storage, networks, and otherfundamental computing resources where the consumer is able to deploy andrun arbitrary software, which can include operating systems andapplications. The consumer does not manage or control the underlyingcloud infrastructure but has control over operating systems, storage,deployed applications, and possibly limited control of select networkingcomponents (e.g., host firewalls).

Deployment Models are as follows:

Private cloud: the cloud infrastructure is operated solely for anorganization. It may be managed by the organization or a third party andmay exist on-premises or off-premises.

Community cloud: the cloud infrastructure is shared by severalorganizations and supports a specific community that has shared concerns(e.g., mission, security requirements, policy, and complianceconsiderations). It may be managed by the organizations or a third partyand may exist on-premises or off-premises.

Public cloud: the cloud infrastructure is made available to the generalpublic or a large industry group and is owned by an organization sellingcloud services.

Hybrid cloud: the cloud infrastructure is a composition of two or moreclouds (private, community, or public) that remain unique entities butare bound together by standardized or proprietary technology thatenables data and application portability (e.g., cloud bursting forload-balancing between clouds).

A cloud computing environment is service oriented with a focus onstatelessness, low coupling, modularity, and semantic interoperability.At the heart of cloud computing is an infrastructure comprising anetwork of interconnected nodes.

Referring now to FIG. 5, illustrative cloud computing environment 50 isdepicted. As shown, cloud computing environment 50 comprises one or morecloud computing nodes 10 with which local computing devices used bycloud consumers, such as, for example, personal digital assistant (PDA)or cellular telephone 54A, desktop computer 54B, laptop computer 54C,and/or automobile computer system 54N may communicate. Nodes 10 maycommunicate with one another. They may be grouped (not shown) physicallyor virtually, in one or more networks, such as Private, Community,Public, or Hybrid clouds as described hereinabove, or a combinationthereof. This allows cloud computing environment 50 to offerinfrastructure, platforms and/or software as services for which a cloudconsumer does not need to maintain resources on a local computingdevice. It is understood that the types of computing devices 54A-N shownin FIG. 5 are intended to be illustrative only and that computing nodes10 and cloud computing environment 50 can communicate with any type ofcomputerized device over any type of network and/or network addressableconnection (e.g., using a web browser).

Referring now to FIG. 6, a set of functional abstraction layers providedby cloud computing environment 50 (FIG. 5) is shown. It should beunderstood in advance that the components, layers, and functions shownin FIG. 6 are intended to be illustrative only and embodiments of theinvention are not limited thereto. As depicted, the following layers andcorresponding functions are provided:

Hardware and software layer 60 includes hardware and softwarecomponents. Examples of hardware components include: mainframes 61; RISC(Reduced Instruction Set Computer) architecture based servers 62;servers 63; blade servers 64; storage devices 65; and networks andnetworking components 66. In some embodiments, software componentsinclude network application server software 67 and database software 68.

Virtualization layer 70 provides an abstraction layer from which thefollowing examples of virtual entities may be provided: virtual servers71; virtual storage 72; virtual networks 73, including virtual privatenetworks; virtual applications and operating systems 74; and virtualclients 75.

In one example, management layer 80 may provide the functions describedbelow. Resource provisioning 81 provides dynamic procurement ofcomputing resources and other resources that are utilized to performtasks within the cloud computing environment. Metering and Pricing 82provide cost tracking as resources are utilized within the cloudcomputing environment, and billing or invoicing for consumption of theseresources. In one example, these resources may comprise applicationsoftware licenses. Security provides identity verification for cloudconsumers and tasks, as well as protection for data and other resources.User portal 83 provides access to the cloud computing environment forconsumers and system administrators. Service level management 84provides cloud computing resource allocation and management such thatrequired service levels are met. Service Level Agreement (SLA) planningand fulfillment 85 provide pre-arrangement for, and procurement of,cloud computing resources for which a future requirement is anticipatedin accordance with an SLA.

Workloads layer 90 provides examples of functionality for which thecloud computing environment may be utilized. Examples of workloads andfunctions which may be provided from this layer include: mapping andnavigation 91; software development and lifecycle management 92; virtualclassroom education delivery 93; data analytics processing 94;transaction processing 95; and a user authentication system 96.

Based on the foregoing, a computer system, method, and computer programproduct have been disclosed. However, numerous modifications andsubstitutions can be made without deviating from the scope of thepresent invention. Therefore, the present invention has been disclosedby way of example and not limitation.

While the invention has been shown and described with reference tocertain exemplary embodiments thereof, it will be understood by thoseskilled in the art that various changes in form and details may be madetherein without departing from the spirit and scope of the presentinvention as defined by the appended claims and their equivalents.

What is claimed is:
 1. A method for authenticating a user, the methodcomprising: receiving, by a first computer, a request for a user log infrom a user computing device; authenticating, by the first computer, anidentity of the user and granting the user access to applications hostedon the first computer, wherein one of the those applications is anaccess portal to a second computer; searching, by the first computer, astorage unit for a unique identification that is associated with theuser, and determining, by the first computer, that the uniqueidentification has not been found in the storage unit; in response tonot finding the unique identification in the storage unit, generating,by the first computer, the unique identification to be associated with auser, based on a unique arbitrary value to generate a universally uniqueidentifier; storing, by the first computer, the generated uniqueidentification in the storage unit; receiving, by a second computer, arequest for a user log in from the access portal hosted on the firstcomputer; determining, by the second computer, if the uniqueidentification accompanies the received user log in request, wherein theunique identification is used to authenticate the identity of the user;determining, by the second computer, if the unique identification hasbeen previously received by searching a database to see if the uniqueidentification was already stored in the database; in response to theunique identification not being previously received, determining, by thesecond computer, whether the unique arbitrary value grants access to anapplication on the second computer, and storing, by the second computer,the unique identification to the database; granting, by the secondcomputer, access to the user to the application hosted on the secondcomputer based on the determination.